var C = class { 
  #x 
  #y 
  static z='z' 
  foo(){ 
  	this.#x=1; 
  	this.#y=true; 
  	return 'in foo '+ this.#x + " " + this.#y 
  } 
} 
var c = new C() 
console.log(C.z) 
console.log(c.foo())
